Singleton design pattern

Question

I want to implement this singleton class in java . How can I put these variables in this class?

Please try to implement a java class and if you have problems, come back. — guenhter, May 13 '17 at 11:24
@sp00m I have made a singleton class but i dont know where to put these variables in this class — nourhan Elchiaty, May 13 '17 at 11:33
https://stackoverflow.com/questions/70689/what-is-an-efficient-way-to-implement-a-singleton-pattern-in-java?rq=1 — JHDev, May 13 '17 at 11:33
Possible duplicate of [What is an efficient way to implement a singleton pattern in Java?](http://stackoverflow.com/questions/70689/what-is-an-efficient-way-to-implement-a-singleton-pattern-in-java) — thewaywewere, May 13 '17 at 16:30

score 0 · Accepted Answer · answered May 13 '17 at 11:34

This is one simple example for your singleton. Feel free to add setters and getters as you need it for the fields. I'm not sure what the set-method in your diagram should do but maybe you don't need it anyway.

public class LibraryInfo {
    private static final LibraryInfo instance = new LibraryInfo();
    public static LibraryInfo getInstance() {
        return instance;
    }
    private LibraryInfo() {}

    private String name;
    private int phone;
    private String address;
    private String openTime;
    private String closeTime;

    // getters
}

Singleton design pattern

1 Answers1